Get value from hidden field by clicking different button - php

Question

I have different products and it should have a view description that when clicked, a modal will popup and will show descriptions designated to it. But, I tried first getting the value of the hidden field to test it out. It shows the value of the hidden field when I clicked the first button but when I clicked the others, it didn't change. For example:
Button 1 (View Description):
Button 2 (View Description):
When I clicked button 1 it will show in the modal the value of the hidden field which is 1. But when I click the button 2 it will show in the modal 1 again. What should I do to get the value of the hidden field by clicking the button? Here is my code:
<div id="display">
<?php
include('database_connection.php');
$query = "SELECT * FROM tbl_product ORDER BY id DESC";
$statement = $connect->prepare($query);
if($statement->execute())
{
$result = $statement->fetchAll();
$output = '';
foreach($result as $row)
{
$output .= '
<form method="post">
<div class="col-md-3" style="margin-top:12px;">
<div style="border:1px solid #333; background-color:#f1f1f1; border-radius:5px; padding:16px; height: 383px;" align="center">
<img src="images/'.$row["image"].'" class="img-responsive" /><br />
<h4 class="text-info">'.$row["name"].'</h4>
<h4 class="text-danger">$ '.$row["price"] .'</h4>
<input type="text" name="quantity" id="quantity' . $row["id"] .'" class="form-control" value="1" />
<input type="hidden" name="hidden_name" id="name'.$row["id"].'" value="'.$row["name"].'" />
<input type="hidden" name="hidden_price" id="price'.$row["id"].'" value="'.$row["price"].'" />
<input type="button" name="add_to_cart" id="'.$row["id"].'" style="margin-top:5px;" class="btn btn-success form-control add_to_cart" value="Add to Cart" />
<input type="hidden" name="getprod" id="getprod" value="'.$row["id"].'"/>
<input type="button" name="description" data-toggle="modal" data-target="#myModal" style="margin-top:5px;" class="btn btn-success form-control description" value="View Description" />
</div>
</div>
</form>
';
}
echo $output;
}
?>
</div>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">
<?php $prod = $_POST["getprod"]; ?>
<h1><?php echo $prod; ?></h1>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
</div>
</body>